Law enforcement officials
assisted with evacuation notices and security in response to the
Detwiler Fire in Mariposa County, California. (Photo/Tuolumne County
Sheriff's Office)

Firefighters were experiencing
"extreme and aggressive fire behavior," Cal Fire said. The fire's flames
were also encroaching on "culturally and historically sensitive areas."
More than 2,200 fire personnel are on hand to combat the blaze,
along with over 200 fire engines, nine air tankers and 11 helicopters.